ROTARY DRILLING AND CORING IN PERMAFROST. PART I. PRELIMINARY investigation, FORT CHURCHILL, MANITOBA.

A small rotary drill rig was instrumented and used at Fort Churchill, Manitoba, to investigate the problems of drilling and coring in permafrost. Small diameter augers were also tested. Adequate rates of penetration were easily achieved. However, difficulties were encountered when hole walls and cor...

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Bibliographic Details
Main Author: Lange,G. Robert
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1968
Subjects:
Snow
Ice and Permafrost
Civil Engineering
(*PERMAFROST
DRILLING)
DRILLING MACHINES
DRILLS
SITE SELECTION
ICE
STATISTICAL ANALYSIS
MANITOBA
DRILL CORES
ROTARY DRILLING
Fort Churchill
Churchill
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0681218
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0681218
Description
Summary:A small rotary drill rig was instrumented and used at Fort Churchill, Manitoba, to investigate the problems of drilling and coring in permafrost. Small diameter augers were also tested. Adequate rates of penetration were easily achieved. However, difficulties were encountered when hole walls and core were thawed by warm drilling fluid. Some success was achieved when coring with water cooled by ice. It was concluded that the feasibility of using a low freezing point liquid and/or compressed air and a portable refrigerator should be investigated. (Author)

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